Node Exporter 可观测性最佳实践

apiVersion: apps/v1kind: DaemonSetmetadata:  name: node-exporter  namespace: monitor-sa  labels:    name: node-exporterspec:  selector:    matchLabels:     name: node-exporter  template:    metadata:      labels:        name: node-exporter    spec:      hostPID: true        # 使用主机的PID      hostIPC: true        # 使用主机的IPC      hostNetwork: true    # 使用主机的网络      containers:      - name: node-exporter        image: quay.io/prometheus/node-exporter:v0.18.1        ports:        - containerPort: 9100        resources:          requests:            cpu: 0.15        securityContext:          privileged: true        args:        - --path.procfs        - /host/proc        - --path.sysfs        - /host/sys        - --collector.filesystem.ignored-mount-points        - '"^/(sys|proc|dev|host|etc)($|/)"'        volumeMounts:        - name: dev          mountPath: /host/dev        - name: proc          mountPath: /host/proc        - name: sys          mountPath: /host/sys        - name: rootfs          mountPath: /rootfs      tolerations:      - key: "node-role.kubernetes.io/master"        operator: "Exists"        effect: "NoSchedule"      volumes:        - name: proc          hostPath:            path: /proc        - name: dev          hostPath:            path: /dev        - name: sys          hostPath:            path: /sys        - name: rootfs          hostPath:            path: /
---
apiVersion: v1kind: Servicemetadata:   name: node-exporter   namespace: monitor-saspec:   type: ClusterIP   ports:   - name: http     port: 9100     protocol: TCP     targetPort: 31672   selector:     name: node-exporter

kubectl create ns monitor-sakubectl apply -f node-exporter.yaml

        - name: ENV_NAMESPACE          value: xxxx

kubectl apply -f datakit.yamlkubectl get pod -n datakit

apiVersion: v1kind: ConfigMapmetadata:  name: datakit-conf  namespace: datakitdata:    kubernetesprometheus.conf: |-      [inputs.kubernetesprometheus]        node_local = true  # 是否开启 NodeLocal 模式，将采集分散到各个节点        [[inputs.kubernetesprometheus.instances]]            role       = "service"     # 必填 可以配置为 service、pod、endpoints、node            namespaces = ["monitor-sa"]    # 非必填，支持配置多个，以逗号隔开，为空会匹配所有            selector   = ""       # 非必填，被采集资源的labels，用来匹配选择需要采集的对象 ，为空会匹配所有
            scrape     = "true"            # 非必需 采集开关，默认true，            scheme     = "http"             port       = "__kubernetes_service_port_%s_port "             path       = "/metrics"        # 非必填 大部分prometheus采集路径都为/metrics，具体以被采集服务实际指标地址为准            params     = ""                # 非必填 http 访问参数，是一个字符串，例如 name=nginx&package=middleware，非必需            interval   = "30s"             # 非必填 采集频率，默认30s
            [inputs.kubernetesprometheus.instances.custom]              measurement        = "kube_NodeExporter"       #非必填 观测云指标名，默认使用指标下划线第一个字母              job_as_measurement = false             #非必填 是否使用数据中的 job 标签值当做指标集名              [inputs.kubernetesprometheus.instances.custom.tags]                instance         = "__kubernetes_mate_instance"    #可选 指标tag                host             = "__kubernetes_mate_host"        #可选 指标tag                pod_name         = "__kubernetes_pod_name"         #可选 指标tag                pod_namespace    = "__kubernetes_pod_namespace"    #可选 指标tag，可以继续新增，这里不继承全局tag和选举tag

- mountPath: /usr/local/datakit/conf.d/kubernetesprometheus/kubernetesprometheus.conf  name: datakit-conf  subPath: kubernetesprometheus.conf  readOnly: true

kubectl delete -f datakit.yamlkubectl apply -f datakit.yaml